The resolution enhancement of photochemical hole burning makes it possible to directly see the effect that an external electric field has on the transition energy resolution of a probe molecule in an organic solid. With an appropriate interpretative model, these experiments can give a detailed picture of intermolecular electrostatic interaction. In this paper classical and quantum mechanical models are reviewed and applied to the same data set. We demonstrate that a relatively simple yet microscopically detailed and easily generalized quantum mechanical model can give an atomic resolution map of electrostatic potential at the chromophore site.